Comblab project finished in December 2014. In this website you can download Comblab teaching materials ready to be used in several languages. Currently most Comblab partners go on working with MBL for secondary science.

You are here

RED OR WHITE? SWEET OR DRY? - Acidity of Wine

The wine is a product that consists of several components, most of which is water (91 %). Besides water, ethanol (9-14 %), residual sugar, dyes and tannins, there are present also acids. There are more acids, but the most represented is tartaric acid, then malic, citric and lactic acid. The proportion of the acids’ amount is a reason of characteristic taste and bitterness of each wine. Low content of acid results in insipid taste of wine, so the determination of total acidity is an important controlled item.

The total acidity of wine is about 5-7 g/L and it is determined as an amount of tartaric acid in one liter of the wine.

You have tasted samples of wine and assessed the degree of sweetness and acidity. Determine the acidity experimentally and compare it to average value and your assessment. Does the measured value correspond to your observation?

Search form

Poll

COMBLAB

The COMBLAB is a Comenius Multilateral Project (2012-2014) funded by the EACEA (Education, Audiovisual & Culture Executive Agency). Project Number 517587-LLP-1-2011-ES-COMENIUS-CMP The acronym COMBLAB is composed from the following words -Competencies for MBL Laboratory. The main objective of the project is to provide a complex support of implementation and employment of ICT and MBL for measurement in secondary (and primary) school laboratory.

Pupils and school levels involved

General secondary education (11/12 to end of compulsory education or even beyond)